Corrugating machine



June 9, 1936. G. w; swlFT, JR 2,043,535

l v CORRUGATING MACHINE Filed April l2, 1955 2 Sheets-Sheet 2 ATTORNEYSalienated t.tiene $9 1936 CORBU'GATING MA George W. Swift, Jr.,Bordentown, N. J., aseignor to George W. Swift, Jr., Inc., Bordentown,N.. J., a corporation of New Jersey The invention relates to corrugatingo w of the type used in the production of corrugated paper, wherein theso-called liner sheet to be corrugated is fed in between a pair oimeshing corrugating rolls; and while passing around with one of saidrolls after the corrugating step the liner is fed past anadhesive-applying roll which contacts with and applies sodium silicateor other suitable adhesive to the peaks of the corrugations, after whicha facing sheet is brought into contact with the above mentioned peaks ofthe con rugations. In the operation of machines of the above type it isdesirable to provide stripper members operating in grooves in the rollsto separate the corrugated paper from one of the corrugating rolls andguide 'it to travel partially around with the other corrugating rollpast the point where the adhesive-applying roll applies adhesive to thepeaks of the corrugations, as well as to guide the corrugated web totravel further along with the second mentioned corrugatlng roll afterthe adhesive-applying operation has been completed.

The present invention aims to improve the machine in respect to thestripping and guiding members employed for the above purposes and toreduce imperfections in the corrugated product as caused by therelatively Wide grooves which heretofore have been provided in theadhesiveapplying rolls to accommodate prior strippermemberconstructions, which resulted in relatively wide areas on thepeaks of the corrugations to which adhesive was not applied to bondproperly with the facing sheet. l

Another object of the invention is to provide for the application ofadhesive to the areas on the peaks of the corrugations which otherwisewould be bare of adhesive on account of the above mentioned grooves inthe adhesive-applying rolls.

Another object of the invention is to avoid undue strains on thestripper members during the expansion and contraction of the corrugatingrolls which is caused by changes in the amount of heat applied thereto,and otherwise to simplify and improve the construction of the strippermembers.

Further objects and advantages of the invention however will be in partobvious and in part speciiically referred to in the descriptionhereinafter contained'which, taken in conjunction with the accompanyingdrawings, discloses a preferred embodiment of the invention; suchembodiment however is to be regarded as merely illustrative of theprinciples of the invention. In the drawingl Fig. 2 is a top plan viewwith certain portions out away. of the parts of the machine which appearin Fig. 1.

Fig. 3 is a detail view showing separately the stripper members andtheir support.

Figs. 4 and 5 illustrate the differences in the product obtainedrespectively without and with the use of an adhesive-applying membersuch as forms one feature of the present invention.

Fig. 6 shows such an adhesive-applying member detached from theremainder of the machine.

The invention is disclosed as applied to a corrugating machine of knowntype as to many of its features of construction and mode of operationand since this, as well as other corrugating machine constructionssuitable for the purpose. are Well known in the art, only the particularparts of the machine will be referred to with which the presentinvention is more directly concerned. I have shown in the drawings apair of meshing corrugating rolls I and 2 which will be understood asheated in suitable manner and supported and driven as is known in theart. The liner sheet 3 after passing partially around the firstcorrugating roll I, passes in between rolls I and 2 where thecorrugating step is performed, and the corrugated web then passes aroundwith the roll 2 past an adhesive-applying roll 4 supported and driven insuitable manner (not illustrated) and which applies a suitableadhesive-usually a silicate of soda solution-to the peaks of thecorrugations of web 3 as the latter is carried by roll 2 pastadhesive-applying roll 4.

To separate the corrugated web 3 from roll I 4o and cause it to becarried around with roll 2, until and after the adhesive has beenapplied as i above mentioned, stripper members have been employed whichproject into circumferential grooves 5 in roll l, and also into asimilar series of cir- 45 cumferential grooves 6 in theadhesive-applying roll 4, these grooves 5 and 6 when employed accordingto prior practice being alined, and the stripper fingers each running inboth grooves and somewhat beyond the roll 4 to insure that the cor- 50or described herein. The corrugating roll 2 will 55 usually havecircumferential grooves 2a toreceive stripping lingers (not illustrated)for separating the single-faced paper thus formed from roll 2, but withthis phase of the machine the present invention is not particularlyconcerned.

In accordance with the present invention the corrugated web is separatedfrom roll I and initially gu'lded to pass around with roll 2, by a setof stripper members 1 carried by a stripper member support 8, preferablylocated above roll 4 and extending transversely across the machinesubstantially parallel to the roll I. Thesestripper members 1 havingflnger-like portions 9 which penetrate into the grooves 5 of roll Iadjacent the part of such roll which is intermeshing with the secondcorrugating roll 2, and the stripper members 1 also extend partiallyaround the periphery of roll '2 toward the adhesive-applying roll 4, butas indicated at I0 the stripper members 1 terminate before reaching theadhesive-applying roll, thus leaving them interengaged with roll I butentirely free of roll 4.

In the illustrated form of the invention the stripper members 1 areadjustably attached by bolts I2 and clamps I3 to ears I4 on blocks I5which are adjustable along a track I6 on support 8. Bolts I1 passingthrough holes I8 in blocks I5, and seated in the track I6 may beemployed to hold the blocks and the stripper members 1 adjustably inposition on track I6.

With a construction of the above nature, the

stripper members 1 are confined as to their position transversely of themachine, only by their engagement with the grooves 5 of roll I, and thuswhen the heat is turned on or olf roll I, causing the latter to expandor contract transversely of and contraction of the the machine, thestripper members 1 may be correspondingly shifted in position and neednot be subjected to undue strains.

It is very desirable to provide a stripper member construction whichwill support the corrugated web and keep it in the corrugations of roll2 while being carried past the adhesive-applying roll 4. This is ofparticular advantage when roll 4 is withdrawn from working position, aswill happen from time to time in practical operation. For this purpose Iprovide a set of guide members I I which are entirely free from thestripper members 1 above described as well as from the corrugating` rollI, these guide members II being extended upwardly to penetrate intogrooves 6 of the adhesive-applying roll 4, and they may also be extendedupwardly still further beyond the lower ends IIJ of stripper members 1,and be carried by the stripper member support 8 above described. Thesemembers II keep the corrugated web in the corrugations of roll 2 duringand after the application of adhesive by roll 4. Supporting blocks andassociated parts similar to the members I2 to I8'above described may beemployed for guide 'members II and they will ordinarily be held flxedlyin position. lAnd as another preferred feature of the invention in itsmore specific aspects, I may position the circumferential grooves 6 ofthe adhesive-applying roll 4, in staggered relation to the grooves 5 andstripper members 1 above described, the guide members II being supportedfrom points along the support 8 which are between the strippermembers 1. It should be noted that the guide members II are whollyunaffected by expansion orrugating rolls and hence the grooves I5l of rl (may be made very naribw in width. In other words, theadhesiveapplyingroll 4 not being heated will not expand of the web havebeen left bare of adhesive.

and contract materially in operation, and expansion and contraction ofthe corrugating rolls will impose no strains on the guide members II,nor tend to shift them in position. The reduc` tion in the width ofgrooves 6 which consequently is possible, is of substantial advantage inreducing areas on the corrugated web to which adhesive is not applied byroll 4, which results in a better bond between the corrugating liner andthe facing sheet. l0

Heretofore where grooves of the above character have been employed inadhesive-applying rolls, the corresponding areas of the corrugations'I'his is illustrated in Fig. 4 which is a perspective view 15 of apiece of single faced corrugated paper having its corrugated liner sheet3 partially torn away from' a facing sheet I9. 'I'he above mentionedbare spots on the liner are indicated at 20 in Fig. 4, and there will becorresponding areas 2l on the 20 facing I9 which are not bonded to thehner.

As another feature of the invention I provide for the application ofadhesive to the areas along the corrugations of liner 3 which otherwisewould be left bare of adhesive, because of the grooves 25 6 in theadhesive-applying roll 4. This may be done, for example,by providingadhesive-applying members 22 located adjacent the corrugating roll 2 inposition to operate on the areas 20 of liner 3 shortly after these areashave passed grooves 6. 30 In the illustrated form of the invention theseadhesive-applying members 22 transfer or spread adhesive from adjacentareas of the peaks of the corrugated liner 3, to the areas 20 thereoff,and are provided for this purpose with grooves 23 3' (Fig. 6) which areinclined in the -direction or travel of the corrugated web, the walls ofthese grooves 23 thus causing adhesive to be conducted to the areas 20on the peaks of corrugated web 3.

The corrugated product, as indicated in Fig. 5, 40 thus has adhesiveapplied all the way along the corrugations of liner 3, to bond properlyat all points with the facing sheet I9. These adhesiveapplying members22 may be supported on the lower ends of guide members II and preferably45 are constructed to act as guides keeping the corrugated web in thecorrugations of roll 2. The above guide members are preferably held inproper position by engaging in notches 24 in a bar 25 which extendstransversely across the machine. 50

'Ihus according to the present invention the corrugated web isadequately guided by the stripper members during its passage between andaround the rolls as above described, but expansion and contraction ofthe corrugating rolls with re- 55 spect to the stripper members and theadhesiveapplying roll ls taken care of in such a way as to avoid unduestrainson the stripper members, and the construction enables a moreperfect product to be produced. t0

Although the invention has been disclosed as carried by certain specicconstruction as above described, it should be understood that many'.

- changes may be made therein without departing penetrating into theabove mentioned grooves of the first corrugating roll adjacent theportion thereof meshing with the second corrugating roll, said strippermembers extending partially around the periphery of said secondcorrugating roll toward the adhesive-applying roll but terminatingbefore reaching the adhesive-applying roll, said' adhesive-applying rollhaving circumferential grooves therein staggered with respect to thoseof the iirst corrugating roll, and a set of guide members penetratinginto the grooves of the adroll hesive-applying roll, and staggered inposition with respect to said first mentioned set of stripper members,said above mentioned set of guide members extending partially around thesecond corrugating roll, said above mentioned set of guide members beingseparate from the stripper mem--y bers and free of the rst corrugatingroll.

2. A corrugating machine having a irst corrugating roll, a secondcorrugating roll meshing therewith, an adhesive applying roll adjacentto the second corrugating roll in position to apply adhesive to thepeaks of a corrugated web passing around' with the second corrugatingroll, said first mentioned corrugating roll having circumferentialgrooves therein, a stripper member support extending transversely acrossthe machine substantially parallel to the above mentioned rolls, a setof stripper members carried by said support and penetrating into theabove mentioned grooves of the rst `corrugating roll ad jacent theportion thereof meshing with the second corrugating roll, said strippermembers extending partially around the periphery of said secondcorrugating roll toward the adhesiveapplying roll but terminating beforereaching the adhesive-applying roll, said adhesive applying havingcircumferential grooves therein staggered with respect to those of thefirst corrugating'roll, and a set of guide members penetrating into. thegrooves of the adhesive-applying roll, and staggered in position withrespect to said rst mentioned set of stripper members, saidabovementioned set of guide members extending partially around thesecond corrugating roll to guide the corrugated web partially aroundsaid roll after the adhesive has been applied thereto by said adhesiveapplying roll, said above mentioned set of guide members being free ofthe first corrugating roll and being also carried by the stripper membersupport at points thereon between the first mentioned set of strippermembers,

3. A corrugating machine having a rst corrugating roll, a secondcorrugating roll meshing therewith, an adhesive-applying roll adjacentthe second corrugating roll in position to apply adhesive to the peaksof a corrugated web passing around with the second corrugating roll,said ilrst mentioned corrugating roll having circumferential groovestherein, a set of stripper members penetrating into the above mentionedgrooves of the first corrugating roll adjacent the portion i thereofintermeshing with the second corrugating roll, said stripper membersextending partially around the periphery of said second corrugating rolltoward the adhesive-applying roll but terminating before reaching theadhesive-applying roll, said adhesive-applying roll alsohavingcircumferential grooves therein `and a set of guide members penetratinginto said last mentioned grooves and extending partially around thesecond corrugating roll to guide the corrugated web partially aroundwith the part of said roll which is near said adhesive-applying roll,said above mentioned set of guide members being free of substantiallyparallel to said rolls, a set of stripper members carried by saidsupport and penetrating into the above mentioned grooves of the rstcorrugating roll adjacent the portion thereof intermeshing with thesecond corrugating roll, said stripper members extending partiallyaround the' periphery of said second corrugating roll toward theadhesive-applying roll but terminating before reaching theadhesive-applying roll, said adhesive-applying roll also havingcircumferential grooves therein and a set of guide members penetratinginto said last mentioned grooves and extending partially around thesecond corrugating roll to guide the corrugated web partially aroundsaid roll after the adhesive has been applied thereto by saidadhesive-applying roll. said above mentioned set of guide members beingfree of the rst corrugating roll. said stripper member support beinglocated above the adhesive-applying roll and said above mentioned set ofguide members being also carried thereby and projecting downwardlythrough the grooves in the adhesive-applying roll to guide the webaround the second corrugating roll as above mentioned.

5. A corrugating machine having an adhesiveapplying roll positioned toapply adhesive to the peaks of a corrugated web passing through themachine, said adhesive-applying roll having circumferential groovestherein, guide members penetrating into said grooves to engage the webadjacent said adhesive-applying roll and members positioned to act onthe corrugated web after it has passed said adhesive-applying roll, forapplying adhesive to the areas of the peaks of the corrugated web whichare in line with the above mentioned circumferential grooves of theadhesive-applying roll.

6. A corrugating machine having a first corrugating roll, a secondcorrugating roll meshing therewith, an adhesive-applying rolladjacentthe second mentioned corrugating roll, said adhesive-applyingroll having circumferential grooves therein, guide members penetratinginto said grooves and extending partially around said second corrugatingroll, to engage the web during and after the application of adhesivethereto, and members carried by the above mentioned extended portions ofsaid guide members for transferring adhesive from the peaks of thecorrugated web to the areas thereof which are in line with the abovementioned circumferential grooves of the adhesive-applying roll.

'7. A corrugating machine having a rst corrugating roll. a secondcorrugating roll meshing therewith, an adhesive-applying roll adjacentthe second corrugating rollin position to lapply adhesive to the peaksof a corrugated web passing along with the second corrugating roll, saidadhesive applying roll having circumferential grooves therein, guidemembers penetrating into said grooves and extending partially around thesecond corrugating roll to guide the corrugated web after adhesive hasbeen applied thereto, said v adhesive from the peaks oi! thecorrugations to areas thereof which are in line with the above mentionedcircumferential grooves.

8. A corrugating machine having a corrugating.roll, an adhesive applyingroll located adjacentithereto in position to apply adhesive to a webpassing between said rolls, said adhesive applying roll having acircumferential groove therein, and a member. positioned to act on thecorrugated web for applying adhesive to the area of the web which is inline with the above mentioned circumferential groove oi' the adhesiveapplying roll.

9. A corrugating machine having a corrugating roll, an adhesive applyingroll located adjacent thereto in position to apply adhesive to a webpassing between saidrolls, said adhesive applying roll having acircumferential groove therein, and a member positioned to act on thecorrugated web after adhesive has been applied thereto by said adhesiveapplying roll, said member being provided with means for transfer-GEORGE W. SWIFT. Jn.

